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2 vulnerabilities found for Amazon SSM Agent by AWS
CVE-2026-89049 (GCVE-0-2026-89049)
Vulnerability from nvd – Published: 2026-09-10 18:34 – Updated: 2026-09-10 18:57
VLAI
EPSS
VEX
Title
Server-side request forgery in the Session Manager port forwarding functionality in AWS Systems Manager Agent
Summary
A server-side request forgery issue due to improper validation of equivalent address representations in the port forwarding to remote hosts functionality in Amazon AWS Systems Manager Agent (SSM Agent) before 3.3.4851.0 on all platforms might allow an authenticated remote user to bypass the remote destination denylist and reach link-local endpoints, potentially obtaining the temporary IAM role credentials of a managed instance and acting with that role's permissions from outside the instance, via a crafted destination host value that uses an alternate representation of a denied link-local address.
To remediate this issue, users should upgrade to version 3.3.4851.0 or later.
Severity
9.9 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-10 18:57 UTC
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/aws/amazon-ssm-agent/releases/… | patch |
| https://aws.amazon.com/security/security-bulletin… | vendor-advisory |
| https://github.com/aws/amazon-ssm-agent/security/… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| AWS | Amazon SSM Agent |
Affected:
0 , < 3.3.4851.0
(custom)
cpe:2.3:a:aws:amazon_ssm_agent:*:*:*:*:*:*:*:* |
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CVE-2026-89049 (GCVE-0-2026-89049)
Vulnerability from cvelistv5 – Published: 2026-09-10 18:34 – Updated: 2026-09-10 18:57
VLAI
EPSS
VEX
Title
Server-side request forgery in the Session Manager port forwarding functionality in AWS Systems Manager Agent
Summary
A server-side request forgery issue due to improper validation of equivalent address representations in the port forwarding to remote hosts functionality in Amazon AWS Systems Manager Agent (SSM Agent) before 3.3.4851.0 on all platforms might allow an authenticated remote user to bypass the remote destination denylist and reach link-local endpoints, potentially obtaining the temporary IAM role credentials of a managed instance and acting with that role's permissions from outside the instance, via a crafted destination host value that uses an alternate representation of a denied link-local address.
To remediate this issue, users should upgrade to version 3.3.4851.0 or later.
Severity
9.9 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-10 18:57 UTC
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/aws/amazon-ssm-agent/releases/… | patch |
| https://aws.amazon.com/security/security-bulletin… | vendor-advisory |
| https://github.com/aws/amazon-ssm-agent/security/… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| AWS | Amazon SSM Agent |
Affected:
0 , < 3.3.4851.0
(custom)
cpe:2.3:a:aws:amazon_ssm_agent:*:*:*:*:*:*:*:* |
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